2013-01-19 05:10:09 +04:00
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/*
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2013-02-07 06:05:00 +04:00
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* Copyright 2013 Haiku Inc. All rights reserved.
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2013-01-19 05:10:09 +04:00
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* Distributed under the terms of the MIT License.
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*
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2013-02-07 06:05:00 +04:00
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* Authors:
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* John Scipione, jscipione@gmail.com
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*
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2013-01-19 05:10:09 +04:00
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* Corresponds to:
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2013-02-08 06:19:06 +04:00
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* headers/os/interface/Font.h hrev45178
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* src/kits/interface/Font.cpp hrev45178
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\file Font.h
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2013-02-07 06:05:00 +04:00
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\ingroup interface
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\ingroup libbe
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\brief BFont class definition, unicode_block class definition, and
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font-related struct and enum definitions.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_CHAR_SPACING
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2013-01-19 10:23:44 +04:00
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Position each character without adjustment. Best mode for printing.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_STRING_SPACING
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2013-02-07 06:05:00 +04:00
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2013-01-19 10:23:44 +04:00
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Optimizes the position of each character within it's space. Collisions
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are unlikely but characters may touch each other. Best mode to use when
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the screen needs to match what appears on the printed page.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_BITMAP_SPACING
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The widths of the characters are chosen so that they never collide and
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rarely touch. Best mode for drawing small amounts of text.
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*/
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/*!
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\var B_FIXED_SPACING
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2013-01-19 10:23:44 +04:00
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Positions characters at a constant width. Best mode for fixed-width fonts.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\enum font_direction
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\ingroup interface
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2013-01-19 10:23:44 +04:00
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Determines the direction of the text rendered by the font,
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left-to-right or right-to-left.
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*/
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2013-01-19 05:10:09 +04:00
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/*!
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\var font_direction B_FONT_LEFT_TO_RIGHT
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Left to right.
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*/
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/*!
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\var font_direction B_FONT_RIGHT_TO_LEFT
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Right to left.
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*/
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/*!
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\var B_DISABLE_ANTIALIASING
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2013-01-19 10:23:44 +04:00
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Disable antialiasing. Used by BFont::Flags() and BFont::SetFlags().
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*/
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/*!
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\var B_FORCE_ANTIALIASING
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Force antialiasing. Used by BFont::Flags() and BFont::SetFlags().
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*/
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/*!
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\var B_TRUNCATE_END
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2013-01-19 11:45:18 +04:00
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Truncate from the end of the string.
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*/
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/*!
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\var B_TRUNCATE_BEGINNING
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Truncate from the beginning of the string.
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*/
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/*!
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\var B_TRUNCATE_MIDDLE
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2013-01-19 10:23:44 +04:00
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Truncate from the middle of the string.
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*/
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/*!
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\var B_TRUNCATE_SMART
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2013-01-19 10:23:44 +04:00
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Truncate while keeping each string unique.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_UNICODE_UTF8
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UTF-8 font encoding.
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*/
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/*!
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\var B_ISO_8859_1
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2013-01-19 10:23:44 +04:00
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ISO 8859-1 aka Latin 1 "Western European" font encoding.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_ISO_8859_2
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ISO 8859-2 aka Latin 2 "Eastern European" font encoding.
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*/
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/*!
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\var B_ISO_8859_3
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ISO 8859-3 aka Latin 3 "South European" font encoding.
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*/
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/*!
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\var B_ISO_8859_4
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ISO 8859-4 aka Latin 4 "Northern European" font encoding.
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2013-01-19 05:10:09 +04:00
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*/
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/*!
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\var B_ISO_8859_5
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ISO 8859-5 "Latin/Cyrillic" font encoding.
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*/
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/*!
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\var B_ISO_8859_6
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ISO 8859-6 "Latin/Arabic" font encoding.
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*/
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/*!
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\var B_ISO_8859_7
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ISO 8859-7 "Latin/Greek" font encoding.
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*/
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/*!
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\var B_ISO_8859_8
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ISO 8859-8 "Latin/Hebrew" font encoding.
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*/
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/*!
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\var B_ISO_8859_9
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ISO 8859-9 aka Latin 5 "Latin/Turkish" font encoding.
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*/
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/*!
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\var B_ISO_8859_10
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2013-01-19 10:23:44 +04:00
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ISO 8859-10 aka Latin 6 "Nordic" font encoding.
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*/
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/*!
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\var B_MACINTOSH_ROMAN
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Macintosh Roman font encoding.
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*/
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/*!
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\var B_HAS_TUNED_FONT
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Flags for get_font_family() and get_font_style()
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*/
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/*!
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\var B_IS_FIXED
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flags for get_font_family() and get_font_style()
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*/
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/*!
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\var B_ITALIC_FACE
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Italic font face flag.
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*/
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/*!
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\var B_UNDERSCORE_FACE
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Underscore font face flag.
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*/
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/*!
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\var B_NEGATIVE_FACE
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Negative font face flag.
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*/
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/*!
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\var B_OUTLINED_FACE
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Outline font face flag.
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*/
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/*!
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\var B_STRIKEOUT_FACE
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Strikeout font face flag.
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*/
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/*!
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\var B_BOLD_FACE
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Bold font face flag.
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*/
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/*!
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\var B_REGULAR_FACE
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Regular font face flag.
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*/
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/*!
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\var B_CONDENSED_FACE
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Condensed font face flag. Not in BeOS 5.
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*/
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/*!
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\var B_LIGHT_FACE
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Light font face flag. Not in BeOS 5.
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*/
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/*!
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\var B_HEAVY_FACE
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Heavy font face flag. Not in BeOS 5.
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*/
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/*!
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\enum font_metric_mode
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Font metric mode, screen or printing.
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*/
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/*!
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\var font_metric_mode B_SCREEN_METRIC
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2013-01-19 05:10:09 +04:00
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Screen font metric mode.
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*/
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/*!
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\var font_metric_mode B_PRINTING_METRIC
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2013-01-19 11:45:18 +04:00
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Printing font metric mode.
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*/
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/*!
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\enum font_file_format
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\ingroup interface
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2013-01-19 10:23:44 +04:00
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Font file format, TrueType™ or PostScript™ Type1.
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\see BFont::FileFormat()
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*/
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/*!
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\var font_file_format B_TRUETYPE_WINDOWS
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TrueType™ font file format.
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*/
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/*!
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\var font_file_format B_POSTSCRIPT_TYPE1_WINDOWS
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PostScript™ Type1 font file format.
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*/
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/*!
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\class unicode_block
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\ingroup interface
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\ingroup libbe
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\brief Describes the blocks of Unicode characters supported by a font.
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\see BFont::Blocks()
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*/
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/*!
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\fn unicode_block::unicode_block()
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\brief Construct a \c unicode_block and set block data to 0.
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You must initialize the block data before before using this object.
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*/
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/*!
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\fn unicode_block::unicode_block(uint64 block2, uint64 block1)
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\brief Construct a \c unicode_block object and initialize it with the
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supplied Unicode block range.
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\param block2 End block.
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\param block1 Begin block.
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*/
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/*!
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\fn bool unicode_block::Includes(const unicode_block& block) const
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\brief Determines if \a block is a subset of the \c unicode_block object.
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\param block The Unicode block to check.
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\returns Whether or not \a block is a subset of the \c unicode_block
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object.
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2013-01-19 11:45:18 +04:00
|
|
|
\retval true \a block is a subset of the current \c unicode_block.
|
|
|
|
\retval false \a block is NOT a subset of the current \c unicode_block.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\name Assignment operators
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
//! @{
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn unicode_block unicode_block::operator&(const unicode_block& block) const
|
|
|
|
\brief Creates a new \c unicode_block object that is the intersection of
|
|
|
|
\a block and the \c unicode_block object.
|
|
|
|
|
|
|
|
\param block The Unicode block to intersect with.
|
|
|
|
|
|
|
|
\returns The intersection of \a block and the \c unicode_block object.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn unicode_block unicode_block::operator|(const unicode_block& block) const
|
|
|
|
\brief Creates a new \c unicode_block object that is the union of \a block
|
|
|
|
and the \c unicode_block object.
|
|
|
|
|
|
|
|
\param block The Unicode block to form a union with.
|
|
|
|
|
|
|
|
\returns The union of \a block and the \c unicode_block object.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn unicode_block& unicode_block::operator=(const unicode_block& block)
|
|
|
|
\brief Copies \a block data into the left-hand side object.
|
|
|
|
|
|
|
|
\param block The unicode block to copy from.
|
|
|
|
|
|
|
|
\returns A copy of \a block.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
//! @}
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\name Comparison operators
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
//! @{
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn bool unicode_block::operator==(const unicode_block& block) const
|
|
|
|
\brief Determines if the block object are exactly equal.
|
|
|
|
|
|
|
|
\param block The unicode block to compare against.
|
|
|
|
|
|
|
|
\returns \c true if the block object are exactly equal, \c false
|
|
|
|
otherwise.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
2013-01-19 10:23:44 +04:00
|
|
|
/*!
|
|
|
|
\fn bool unicode_block::operator!=(const unicode_block& block) const
|
|
|
|
\brief Determines if the block object are not equal.
|
|
|
|
|
|
|
|
\param block The unicode block to compare against.
|
|
|
|
|
|
|
|
\returns \c true if the block object are NOT equal, \c false
|
|
|
|
if the block objects are exactly equal.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
//! @}
|
|
|
|
|
|
|
|
|
2013-01-19 05:10:09 +04:00
|
|
|
/*!
|
|
|
|
\struct edge_info
|
2013-02-07 06:05:00 +04:00
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief The distance that a character outline is inset from its escapement
|
|
|
|
boundaries.
|
|
|
|
|
|
|
|
Edge values, like escapements, need to be multiplied by the font size to
|
|
|
|
get the correct value for the font.
|
|
|
|
|
|
|
|
\see BFont::GetEdges()
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var edge_info::left
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
The distance that the character outline is inset from the left
|
|
|
|
escapement boundary.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var edge_info::right
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
The distance that the character outline is inset from the right
|
|
|
|
escapement boundary.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\struct font_height
|
2013-02-07 06:05:00 +04:00
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief The amount of vertical space surrounding a character.
|
|
|
|
|
|
|
|
\see BFont::GetHeight()
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var font_height::ascent
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
The distance characters can ascend above the baseline.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var font_height::descent
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
The distance characters can descend below the baseline.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var font_height::leading
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
The distance between lines, descent above to ascent below.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\struct escapement_delta
|
2013-02-07 06:05:00 +04:00
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-06-13 22:24:40 +04:00
|
|
|
\brief A struct that allows you to specify extra horizontal space to surround
|
|
|
|
each character with.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
Escapements need to be multiplied by the font size to get the correct
|
|
|
|
value for the font.
|
|
|
|
|
|
|
|
\see BFont::GetEscapements()
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var escapement_delta::nonspace
|
2013-02-07 06:05:00 +04:00
|
|
|
|
2013-06-13 22:24:40 +04:00
|
|
|
The amount of horizontal space to surround a visible glyph character with.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\var escapement_delta::space
|
2013-02-07 06:05:00 +04:00
|
|
|
|
2013-06-13 22:24:40 +04:00
|
|
|
The amount of horizontal space to surround a whitespace character with, for
|
|
|
|
example \c B_TAB or \c B_SPACE.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\struct font_cache_info
|
2013-02-07 06:05:00 +04:00
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-01-19 05:10:09 +04:00
|
|
|
\brief Font cache parameters.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::sheared_font_penalty
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Sheared font penalty.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::rotated_font_penalty
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Rotated font penalty.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::oversize_threshold
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Oversize threshold.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::oversize_penalty
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Oversize penalty.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::cache_size
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Cache size.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var font_cache_info::spacing_size_threshold
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Spacing size threshold.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\struct tuned_font_info
|
2013-02-07 06:05:00 +04:00
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Tuning information of fonts used to make it look better when
|
|
|
|
displayed on-screen.
|
|
|
|
|
|
|
|
\see BFont::GetTunedInfo()
|
|
|
|
\see BFont::CountTuned()
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var tuned_font_info::size
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Font size.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var tuned_font_info::shear
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Font shear.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var tuned_font_info::rotation
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Font rotation.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var tuned_font_info::flags
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Font flags.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\var tuned_font_info::face
|
2013-02-07 06:05:00 +04:00
|
|
|
|
|
|
|
Font face.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int32 count_font_families()
|
|
|
|
\brief Gets the number of installed font families
|
|
|
|
|
|
|
|
\return The number of installed font families
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int32 count_font_styles(font_family family)
|
|
|
|
\brief Gets the number of styles available for a font family.
|
|
|
|
|
|
|
|
\return The number of styles available for a font family.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn status_t get_font_family(int32 index, font_family *_name,
|
|
|
|
uint32 *_flags)
|
|
|
|
\brief Retrieves the family name at the specified index.
|
|
|
|
|
|
|
|
\param index Unique font identifier code.
|
|
|
|
\param _name font_family String to receive the name of the family.
|
|
|
|
\param _flags if non-<tt>NULL</tt>, the values of the flags \c IS_FIXED
|
|
|
|
and \c B_HAS_TUNED_FONT are returned.
|
|
|
|
|
|
|
|
\return A status code, \c B_OK on success or an error code.
|
|
|
|
\retval B_BAD_VALUE \a _name is \c NULL.
|
|
|
|
\retval B_ERROR \a index does not correspond to a font family.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn status_t get_font_style(font_family family, int32 index,
|
|
|
|
font_style *_name, uint32 *_flags)
|
|
|
|
\brief Retrieves the family name at the specified index.
|
|
|
|
|
|
|
|
\param family The font family.
|
|
|
|
\param index Unique font identifier code.
|
|
|
|
\param _name string to receive the name of the family.
|
|
|
|
\param _flags if non-<tt>NULL</tt>, the values of the flags \c IS_FIXED
|
|
|
|
and \c B_HAS_TUNED_FONT are returned
|
|
|
|
|
|
|
|
\return A status code, \c B_OK on success or an error code.
|
|
|
|
\retval B_ERROR \a index does not correspond to a font style.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn status_t get_font_style(font_family family, int32 index,
|
|
|
|
font_style *_name, uint16 *_face, uint32 *_flags)
|
|
|
|
\brief Retrieves the family name at the specified index.
|
|
|
|
|
|
|
|
The face value returned by this function is not very reliable. At the same
|
|
|
|
time, the value returned should be fairly reliable, returning the proper
|
|
|
|
flag for 90%-99% of font names.
|
|
|
|
|
|
|
|
\param family The font family.
|
|
|
|
\param index Unique font identifier code.
|
|
|
|
\param _name String to receive the name of the family.
|
|
|
|
\param _face recipient of font face value, such as \c B_REGULAR_FACE.
|
|
|
|
\param _flags if non-<tt>NULL</tt>, the values of the flags \c IS_FIXED
|
|
|
|
and \c B_HAS_TUNED_FONT are returned.
|
|
|
|
|
|
|
|
\return A status code, \c B_OK on success or an error code.
|
|
|
|
\retval B_ERROR \a index does not correspond to a font style.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn bool update_font_families(bool checkOnly)
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Updates the font families list.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
|
|
|
\param checkOnly Parameter is ignored.
|
|
|
|
|
|
|
|
\return \c true if the font list has changed, \c false if not.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\class BFont
|
|
|
|
\ingroup interface
|
|
|
|
\ingroup libbe
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Represents a typeface including it's family, style and size.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
The Interface Kit provides three prebuilt BFont objects which can be used
|
|
|
|
but not modified.
|
|
|
|
- \c const BFont* \c be_plain_font A plain font used by many controls.
|
|
|
|
- \c const BFont* \c be_bold_font A bold font used by titles.
|
|
|
|
- \c const BFont* \c be_fixed_font A fixed-width font.
|
|
|
|
|
|
|
|
A BFont object does nothing on it's own but is used in combination with
|
|
|
|
a view or control. Here is an example of creating a BFont object from a
|
|
|
|
system font and assigning it to a view:
|
|
|
|
|
|
|
|
\code
|
|
|
|
BFont font(be_plain_font);
|
|
|
|
font.SetSize(12.0);
|
|
|
|
font.SetEncoding(B_ISO_8859_1);
|
|
|
|
view->SetFont(&font);
|
|
|
|
\endcode
|
|
|
|
|
|
|
|
You may also create a BFont object from a view, modify it and reassign it
|
|
|
|
back to the view like this:
|
|
|
|
|
|
|
|
\code
|
|
|
|
BFont font;
|
|
|
|
view->GetFont(&font);
|
|
|
|
font.SetFace(B_ITALIC_FACE);
|
|
|
|
font.SetSpacing(B_CHAR_SPACING);
|
|
|
|
myView->SetFont(&font);
|
|
|
|
\endcode
|
|
|
|
|
|
|
|
You can change the way a font renders with the SetFamilyAndStyle(),
|
|
|
|
SetFamilyAndFace(), SetSize(), SetShear(), SetRotation(),
|
|
|
|
SetFalseBoldWidth(), SetSpacing(), SetEncoding(), SetFace(), and
|
|
|
|
SetFlags() methods.
|
|
|
|
|
|
|
|
More information about the space taken up by a font can be determined
|
|
|
|
by querying a BFont object using the following methods:
|
|
|
|
StringWidth(), GetStringWidths() GetEscapements(), GetEdges(),
|
|
|
|
GetHeight(), BoundingBox() GetBoundingBoxesAsGlyphs(),
|
|
|
|
GetBoundingBoxesAsString(), and GetBoundingBoxesForStrings().
|
|
|
|
|
|
|
|
You can also perform intelligent string truncation with the
|
|
|
|
TruncateString() and GetTruncatedStrings() methods.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn BFont::BFont()
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Creates a BFont object initialized to \c be_plain_font.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\see BView::GetFont()
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn BFont::BFont(const BFont &font)
|
|
|
|
\brief Creates and initializes a BFont object from another BFont object.
|
|
|
|
|
|
|
|
\param font The BFont object to initialize from.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn BFont::BFont(const BFont *font)
|
|
|
|
\brief Creates and initializes a BFont object from a pointer to a BFont
|
|
|
|
object.
|
|
|
|
|
|
|
|
\param font The pointer to a BFont object to initialize from.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn BFont::BFont(const BFont *font)
|
|
|
|
\brief Creates and initializes a BFont object from a pointer to a BFont
|
|
|
|
object.
|
|
|
|
|
|
|
|
\param font The pointer to a BFont object to initialize from.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn status_t BFont::SetFamilyAndStyle(const font_family family,
|
|
|
|
const font_style style)
|
|
|
|
\brief Sets the font's family and style all at once.
|
|
|
|
|
|
|
|
\param family Font family to set.
|
|
|
|
\param style Font style to set.
|
|
|
|
|
|
|
|
\returns A status code, \c B_OK on success or an error code.
|
|
|
|
\retval B_BAD_VALUE \a family is \c NULL and \a style is \c NULL.
|
|
|
|
\retval B_NAME_NOT_FOUND Family or style do not exist.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 10:23:44 +04:00
|
|
|
\fn void BFont::SetFamilyAndStyle(uint32 code)
|
2013-01-19 05:10:09 +04:00
|
|
|
\brief Sets the font's family and style from a font identifier.
|
|
|
|
|
|
|
|
\param code Unique font identifier obtained from the server.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn status_t BFont::SetFamilyAndFace(const font_family family, uint16 face)
|
|
|
|
\brief Sets the font's family and face all at once.
|
|
|
|
|
|
|
|
\param family Font family to set.
|
|
|
|
\param face Font face to set.
|
|
|
|
|
|
|
|
\note To comply with the BeBook, this function will only set valid values,
|
|
|
|
i.e. passing a nonexistent family will cause only the face to be set.
|
|
|
|
Additionally, if a particular face does not exist in a family, the
|
|
|
|
closest match will be chosen.
|
|
|
|
|
2013-01-19 11:51:31 +04:00
|
|
|
\returns A status code, \c B_OK on success or an error code.
|
2013-01-19 05:10:09 +04:00
|
|
|
\retval B_ERROR Family does not exists or face has an invalid value.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetSize(float size)
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Sets the font size.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
|
|
|
\param size The point size to set the font to.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetShear(float shear)
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Sets the angle in degrees relative to the baseline.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
|
|
|
The default shear is 90.0° measured counterclockwise. The shear
|
|
|
|
range is from 45.0° to 135.0°.
|
|
|
|
|
2013-01-19 10:23:44 +04:00
|
|
|
\param shear The shear in degrees to set the font to.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetRotation(float rotation)
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Sets the font rotation from the baseline in degrees.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
|
|
|
The default baseline is 0° and rotates counterclockwise. Rotation is not
|
|
|
|
supported by BTextView.
|
|
|
|
|
2013-01-19 10:23:44 +04:00
|
|
|
\param rotation The rotation in degrees to set the font to.
|
2013-01-19 05:10:09 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetFalseBoldWidth(float width)
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Sets the false bold width.
|
2013-01-19 05:10:09 +04:00
|
|
|
|
|
|
|
\param width The false bold width to set.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
2013-01-19 10:23:44 +04:00
|
|
|
/*!
|
|
|
|
\fn void BFont::SetSpacing(uint8 spacing)
|
|
|
|
\brief Sets how characters are horizontally spaced relative to each other.
|
|
|
|
|
|
|
|
- \c B_CHAR_SPACING Position each character without adjustment. Best mode
|
|
|
|
for printing. Characters may collide or overlap at small font sizes.
|
|
|
|
- \c B_STRING_SPACING Optimizes the position of each character within it's
|
|
|
|
space. Collisions are unlikely but characters may touch each other.
|
|
|
|
Best mode to use when the screen needs to match what appears on the
|
|
|
|
printed page. Adding new characters requires the entire string to
|
|
|
|
be redrawn.
|
|
|
|
- \c B_BITMAP_SPACING The widths of the characters are chosen so that they
|
|
|
|
never collide and rarely touch. Best mode for drawing small amounts
|
|
|
|
of text. Character widths are integral values. Spacing on screen will
|
|
|
|
not match spacing used by \c B_CHAR_SPACING mode for printing.
|
|
|
|
- \c B_FIXED_SPACING Positions characters at a constant width. Must be
|
|
|
|
used with fixed-width fonts otherwise \c B_CHAR_SPACING mode is used.
|
|
|
|
All characters have an identical integral escapement.
|
|
|
|
|
|
|
|
\c B_STRING_SPACING and \c B_BITMAP_SPACING modes are relevant only for
|
|
|
|
font sizes from 7.0pt to 18.0pt, above and below that range
|
|
|
|
\c B_CHAR_SPACING produces nicer results. \c B_CHAR_SPACING is also always
|
|
|
|
used for rotated or sheared text and when antialiasing is disabled.
|
|
|
|
|
|
|
|
\param spacing The spacing mode to set.
|
|
|
|
|
|
|
|
\see BView::DrawString()
|
|
|
|
\see GetEscapements()
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetEncoding(uint8 encoding)
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Sets the character encoding of the font for example
|
|
|
|
\c B_UNICODE_UTF8 or \c B_ISO_8859_1.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
The following character encodings are supported:
|
|
|
|
- \c B_UNICODE_UTF8
|
|
|
|
- \c B_ISO_8859_1 aka Latin 1 aka "Western European".
|
|
|
|
- \c B_ISO_8859_2 aka Latin 2 aka "Eastern European".
|
|
|
|
- \c B_ISO_8859_3 aka Latin 3 aka "South European".
|
|
|
|
- \c B_ISO_8859_4 aka Latin 4 aka "Northern European".
|
|
|
|
- \c B_ISO_8859_5 aka "Latin/Cyrillic".
|
|
|
|
- \c B_ISO_8859_6 aka "Latin/Arabic".
|
|
|
|
- \c B_ISO_8859_7 aka "Latin/Greek".
|
|
|
|
- \c B_ISO_8859_8 aka "Latin/Hebrew".
|
|
|
|
- \c B_ISO_8859_9 aka Latin 5 aka "Latin/Turkish".
|
|
|
|
- \c B_ISO_8859_10 aka Latin 6 aka "Nordic".
|
|
|
|
- \c B_MACINTOSH_ROMAN
|
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\param encoding The character encoding to set the font to.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetFace(uint16 face)
|
|
|
|
\brief Sets the font face according to the flags set by \a face.
|
|
|
|
|
|
|
|
The following font face flags are supported:
|
|
|
|
- \c B_ITALIC_FACE Characters are slanted to the right.
|
|
|
|
- \c B_UNDERSCORE_FACE Characters are underlined.
|
|
|
|
- \c B_NEGATIVE_FACE High and low colors are reversed when drawing
|
|
|
|
characters.
|
|
|
|
- \c B_OUTLINED_FACE Characters are drawn hollowed out.
|
|
|
|
- \c B_STRIKEOUT_FACE A horizontal line is drawn through their middle.
|
|
|
|
- \c B_BOLD_FACE Characters are bold.
|
|
|
|
- \c B_REGULAR_FACE Characters are drawn normally.
|
2013-01-19 22:13:27 +04:00
|
|
|
- \c B_CONDENSED_FACE Characters are drawn condensed. Not in BeOS 5.
|
2013-01-19 10:23:44 +04:00
|
|
|
- \c B_LIGHT_FACE Characters are drawn thiner than normal. Not in BeOS 5.
|
|
|
|
- \c B_HEAVY_FACE Characters are drawn heavier than normal. Not in BeOS 5.
|
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\param face The bitmap of font face flags to set.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::SetFlags(uint32 flags)
|
|
|
|
\brief Sets font flags controlling antialiasing.
|
|
|
|
|
|
|
|
The following flags are supported:
|
2013-01-19 11:54:22 +04:00
|
|
|
- \c B_DISABLE_ANTIALIASING Disable antialiasing.
|
|
|
|
- \c B_FORCE_ANTIALIASING Force antialiasing.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\param flags The bitmap of flags to set.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetFamilyAndStyle(font_family *family,
|
|
|
|
font_style *style) const
|
|
|
|
\brief Writes out the name of the font family and/or font style.
|
|
|
|
|
|
|
|
This method may be called with either \a family or \a style set to
|
|
|
|
\c NULL in order to get one or the other.
|
|
|
|
|
|
|
|
\param family A font_family pointer to be filled out.
|
|
|
|
\param style A font_style pointer to be filled out.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn uint32 BFont::FamilyAndStyle() const
|
|
|
|
\brief Gets the code of the font family and style combination.
|
|
|
|
|
|
|
|
\returns The family and style combination encoded as a unique integer.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetFamilyAndStyle(uint32 code)
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn float BFont::Size() const
|
|
|
|
\brief Gets the font size.
|
|
|
|
|
|
|
|
\returns The font size in points.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetSize()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
2013-01-19 11:45:18 +04:00
|
|
|
\fn float BFont::Shear() const
|
2013-01-19 10:23:44 +04:00
|
|
|
\brief Gets the font shear.
|
|
|
|
|
|
|
|
\returns The font shear as an angle from 45.0° to 135.0°.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetShear()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn float BFont::Rotation() const
|
|
|
|
\brief Gets the font rotation.
|
|
|
|
|
|
|
|
\returns The font rotation as an angle in degrees.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetRotation()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn float BFont::FalseBoldWidth() const
|
|
|
|
\brief Gets the width of the font as if it were bold.
|
|
|
|
|
|
|
|
\returns The font width of the bold font variety.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetFalseBoldWidth()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn uint8 BFont::Spacing() const
|
|
|
|
\brief Gets the spacing constant.
|
|
|
|
|
|
|
|
\returns The spacing constant.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetSpacing()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn uint8 BFont::Encoding() const
|
|
|
|
\brief Gets the character encoding constant.
|
|
|
|
|
|
|
|
\returns The character encoding constant.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetEncoding()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn uint16 BFont::Face() const
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Gets the font face flags bitmap.
|
|
|
|
|
|
|
|
\returns The font face flags bitmap.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\see SetFace()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn uint32 BFont::Flags() const
|
|
|
|
\brief Gets the antialiasing flags.
|
|
|
|
|
|
|
|
\returns The antialiasing flags.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
|
|
|
\see SetFlags()
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn font_direction BFont::Direction() const
|
|
|
|
\brief Gets the font direction, left-to-right or right-to left.
|
|
|
|
|
|
|
|
\returns The font direction.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn bool BFont::IsFixed() const
|
|
|
|
\brief Gets whether or not the font is fixed width.
|
|
|
|
|
|
|
|
\returns \c true if the font is fixed width, \c false otherwise.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
2013-01-19 05:10:09 +04:00
|
|
|
/*!
|
|
|
|
\fn bool BFont::IsFullAndHalfFixed() const
|
|
|
|
\brief Returns whether or not the font is fixed-width and contains both
|
|
|
|
full and half-width characters.
|
|
|
|
|
|
|
|
\note This was left unimplemented as of R5. It is a way to work with both
|
|
|
|
Kanji and Roman characters in the same fixed-width font.
|
|
|
|
*/
|
|
|
|
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn BRect BFont::BoundingBox() const
|
|
|
|
\brief Gets a BRect that encloses the font text.
|
|
|
|
|
|
|
|
\returns A BRect that encloses the font text.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn unicode_block BFont::Blocks() const
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Gets a \c unicode_block object that identifies the Unicode blocks
|
|
|
|
supported by this font face and family.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\attention Currently unimplemented, returns an empty \a unicode_block
|
|
|
|
object.
|
|
|
|
|
2013-01-19 11:45:18 +04:00
|
|
|
\returns A \c unicode_block object containing supported Unicode blocks.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn font_file_format BFont::FileFormat() const
|
2013-01-19 11:45:18 +04:00
|
|
|
\brief Gets whether the font is a TrueType™ or PostScript™ Type1 font.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\returns A \c font_file_format struct containing the font file format.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn int32 BFont::CountTuned() const
|
|
|
|
\brief Gets the number of tuned fonts for the font family and style.
|
|
|
|
|
|
|
|
\returns The number of tuned fonts.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetTunedInfo(int32 index, tuned_font_info *info) const
|
|
|
|
\brief Writes information about the tuned font at \a index into \a info.
|
|
|
|
|
|
|
|
The index begins at 0 and counts tuned fonts for current font family and
|
|
|
|
style only.
|
|
|
|
|
|
|
|
\param index The index of desired tuned font.
|
2013-01-19 11:45:18 +04:00
|
|
|
\param info The \a turned_font_info struct to be filled out.
|
2013-01-19 10:23:44 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::TruncateString(BString *inOut, uint32 mode,
|
|
|
|
float width) const
|
|
|
|
\brief Truncates \a inOut to be no longer than \a width using the
|
|
|
|
supplied truncation \a mode.
|
|
|
|
|
|
|
|
The following truncation modes are supported:
|
|
|
|
- \c B_TRUNCATE_BEGINNING Truncate from the beginning of the string.
|
|
|
|
- \c B_TRUNCATE_MIDDLE Truncate from the middle of the string.
|
|
|
|
- \c B_TRUNCATE_END Truncate from the end of the string.
|
|
|
|
- \c B_TRUNCATE_SMART Truncate from anywhere, but do so so that each
|
|
|
|
string is made unique after being truncated.
|
|
|
|
|
|
|
|
\param inOut The BString to truncate.
|
|
|
|
\param mode Truncation mode to use.
|
|
|
|
\param width The maximum width to truncate to.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetTruncatedStrings(const char *stringArray[],
|
|
|
|
int32 numStrings, uint32 mode, float width,
|
|
|
|
BString resultArray[]) const
|
|
|
|
\brief Write truncated BString objects to \a resultArray given source
|
|
|
|
BString objects in \a stringArray.
|
|
|
|
|
|
|
|
The following truncation modes are supported:
|
|
|
|
- \c B_TRUNCATE_BEGINNING Truncate from the beginning of the string.
|
|
|
|
- \c B_TRUNCATE_MIDDLE Truncate from the middle of the string.
|
|
|
|
- \c B_TRUNCATE_END Truncate from the end of the string.
|
|
|
|
- \c B_TRUNCATE_SMART Truncate from anywhere, but do so so that each
|
|
|
|
string is made unique after being truncated.
|
|
|
|
|
|
|
|
\param stringArray The source string array.
|
|
|
|
\param numStrings The number of strings in \a stringArray.
|
|
|
|
\param mode Truncation mode to use.
|
|
|
|
\param width The maximum width to truncate to.
|
|
|
|
\param resultArray The destination string array.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetTruncatedStrings(const char *stringArray[],
|
|
|
|
int32 numStrings, uint32 mode, float width, char *resultArray[]) const
|
|
|
|
\brief Write truncated strings to \a resultArray given source
|
|
|
|
BString objects in \a stringArray.
|
|
|
|
|
|
|
|
\a resultArray is an array of pointers to string buffers which should be
|
|
|
|
allocated ahead of time and should be at least 3 bytes longer than the
|
|
|
|
matching input string. The 3 extra bytes provide enough room for the
|
|
|
|
truncated output given that GetTruncatedStrings() truncates only a
|
|
|
|
single-byte character from the input string and replaces it with an
|
|
|
|
ellipsis character (which takes three bytes for the UTF-8 encoding),
|
|
|
|
and adds a \c NUL-terminator.
|
|
|
|
|
|
|
|
The following truncation modes are supported:
|
|
|
|
- \c B_TRUNCATE_BEGINNING Truncate from the beginning of the string.
|
|
|
|
- \c B_TRUNCATE_MIDDLE Truncate from the middle of the string.
|
|
|
|
- \c B_TRUNCATE_END Truncate from the end of the string.
|
|
|
|
- \c B_TRUNCATE_SMART Truncate from anywhere, but do so so that each
|
|
|
|
string is made unique after being truncated.
|
|
|
|
|
|
|
|
\param stringArray The source string array.
|
|
|
|
\param numStrings The number of strings in \a stringArray.
|
|
|
|
\param mode Truncation mode to use.
|
|
|
|
\param width The maximum width to truncate to.
|
|
|
|
\param resultArray The destination string array.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn float BFont::StringWidth(const char *string) const
|
|
|
|
\brief Determines the amount of space required to draw \a string in the
|
|
|
|
current font.
|
|
|
|
|
|
|
|
\param string The source string.
|
|
|
|
|
|
|
|
\returns The width required to draw the string.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn float BFont::StringWidth(const char *string, int32 length) const
|
|
|
|
\brief Determines the amount of space required to draw \a string in the
|
|
|
|
current font up to \a length characters.
|
|
|
|
|
|
|
|
\param string The source string.
|
|
|
|
\param length The number of characters in \a string to consider.
|
|
|
|
|
|
|
|
\returns The width required to draw the string.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetStringWidths(const char *stringArray[],
|
|
|
|
const int32 lengthArray[], int32 numStrings, float widthArray[]) const
|
|
|
|
\brief Determines the amount of space required to draw each string in
|
|
|
|
\a stringArray and writes the result in \a widthArray.
|
|
|
|
|
|
|
|
\param stringArray The source string array.
|
|
|
|
\param lengthArray The number of characters to consider for each string in
|
|
|
|
\a stringArray
|
|
|
|
\param numStrings The number of strings in \a stringArray.
|
|
|
|
\param widthArray The destination array to put the widths required to draw
|
|
|
|
each string.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetEscapements(const char charArray[], int32 numChars,
|
|
|
|
float escapementArray[]) const
|
|
|
|
\brief Determines the escapements for each char in \a charArray and writes
|
|
|
|
the result in \a escapementArray.
|
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
|
|
|
\param escapementArray The destination array to put the escapements.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetEscapements(const char charArray[], int32 numChars,
|
|
|
|
escapement_delta *delta, float escapementArray[]) const
|
|
|
|
\brief Determines the escapements for each char in \a charArray and writes
|
2013-06-13 22:24:40 +04:00
|
|
|
the result in \a escapementArray with consideration to the horizontal
|
|
|
|
space provided by the escapement \a delta.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 12:01:55 +04:00
|
|
|
The escapement_delta structure contains the following values:
|
2013-06-13 22:24:40 +04:00
|
|
|
- \c nonspace The amount of horizontal space to surround a visible glyph
|
|
|
|
character with.
|
|
|
|
- \c space The amount of horizontal space to surround a whitespace character
|
|
|
|
with, for example \c B_TAB or \c B_SPACE.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
2013-01-19 12:01:55 +04:00
|
|
|
\param delta The escapement_delta structure to use.
|
2013-01-19 10:23:44 +04:00
|
|
|
\param escapementArray The destination array to put the escapements.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetEscapements(const char charArray[], int32 numChars,
|
|
|
|
escapement_delta *delta, BPoint escapementArray[]) const
|
|
|
|
\brief Determines the escapements for each char in \a charArray and writes
|
|
|
|
the result in \a escapementArray as an array of BPoint objects
|
2013-06-13 22:24:40 +04:00
|
|
|
with consideration to the horizontal space provided by the escapement
|
|
|
|
\a delta.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 12:01:55 +04:00
|
|
|
The escapement_delta structure contains the following values:
|
2013-06-13 22:24:40 +04:00
|
|
|
- \c nonspace The amount of horizontal space to surround a visible glyph
|
|
|
|
character with.
|
|
|
|
- \c space The amount of horizontal space to surround a whitespace character
|
|
|
|
with, for example \c B_TAB or \c B_SPACE.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
2013-01-19 12:01:55 +04:00
|
|
|
\param delta The escapement_delta structure to use.
|
2013-01-19 10:23:44 +04:00
|
|
|
\param escapementArray The destination array of escapements as BPoint
|
|
|
|
objects.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetEscapements(const char charArray[], int32 numChars,
|
|
|
|
escapement_delta *delta, BPoint escapementArray[],
|
|
|
|
BPoint offsetArray[]) const
|
|
|
|
\brief Determines the escapements for each char in \a charArray and writes
|
|
|
|
the result in \a escapementArray as an array of BPoint objects
|
2013-06-13 22:24:40 +04:00
|
|
|
with consideration to the horizontal space provided by the escapement
|
|
|
|
\a delta and writes the offsets to \a offsetArray.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 12:01:55 +04:00
|
|
|
The escapement_delta structure contains the following values:
|
2013-06-13 22:24:40 +04:00
|
|
|
- \c nonspace The amount of horizontal space to surround a visible glyph
|
|
|
|
character with.
|
|
|
|
- \c space The amount of horizontal space to surround a whitespace character
|
|
|
|
with, for example \c B_TAB or \c B_SPACE.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
2013-01-19 12:01:55 +04:00
|
|
|
\param delta The escapement_delta structure to use.
|
2013-01-19 10:23:44 +04:00
|
|
|
\param escapementArray The destination array of escapements as BPoint
|
|
|
|
objects.
|
|
|
|
\param offsetArray The destination array of offsets as BPoint objects.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetEdges(const char charArray[], int32 numChars,
|
|
|
|
edge_info edgeArray[]) const
|
|
|
|
\brief Determines the edge information for each character in \a charArray
|
|
|
|
and writes the result in \a edgeArray.
|
|
|
|
|
|
|
|
The \c edge_info struct contains the following values:
|
|
|
|
- \c left The distance that the character outline is inset from the left
|
|
|
|
escapement boundary.
|
|
|
|
- \c right The distance that the character outline is inset from the
|
|
|
|
right escapement boundary.
|
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
|
|
|
\param edgeArray The destination array of \c edge_info structs.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetHeight(font_height *_height) const
|
|
|
|
\brief Fills out the \c font_height struct with the amount of vertical
|
|
|
|
space surrounding a character.
|
|
|
|
|
|
|
|
The \c font_height struct contains the following values:
|
|
|
|
- \c ascent The distance characters can ascend above the baseline.
|
|
|
|
- \c descent The distance characters can descend below the baseline.
|
|
|
|
- \c leading The distance between lines, descent above to ascent below.
|
|
|
|
|
|
|
|
\param _height The \c font_height struct to fill out.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetBoundingBoxesAsGlyphs(const char charArray[],
|
|
|
|
int32 numChars, font_metric_mode mode, BRect boundingBoxArray[]) const
|
|
|
|
\brief Writes an array of BRect objects to \a boundingBoxArray
|
|
|
|
representing the bounding rectangles of each character in
|
|
|
|
\a charArray.
|
|
|
|
|
|
|
|
Each BRect object corresponds to the glyph of one character.
|
|
|
|
|
|
|
|
The \c font_metric_mode should contain one of the following values:
|
|
|
|
- \c B_SCREEN_METRIC The bounding boxes should use the screen metric.
|
|
|
|
- \c B_PRINTING_METRIC The bounding boxes should use the print metric.
|
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
|
|
|
\param mode The \c font_metric_mode to use, screen or printing.
|
|
|
|
\param boundingBoxArray The destination array of BRect bounding boxes.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetBoundingBoxesAsString(const char charArray[],
|
|
|
|
int32 numChars, font_metric_mode mode, escapement_delta *delta,
|
|
|
|
BRect boundingBoxArray[]) const
|
2013-06-13 22:24:40 +04:00
|
|
|
\brief Writes an array of BRect objects to \a boundingBoxArray representing
|
|
|
|
the bounding rectangles of each character in \a charArray with
|
|
|
|
consideration to the horizontal space provided by the escapement
|
2013-01-19 10:23:44 +04:00
|
|
|
\a delta.
|
|
|
|
|
|
|
|
Each BRect object corresponds to the glyph of one character.
|
|
|
|
|
|
|
|
The \c font_metric_mode should contain one of the following values:
|
|
|
|
- \c B_SCREEN_METRIC The bounding boxes should use the screen metric.
|
|
|
|
- \c B_PRINTING_METRIC The bounding boxes should use the print metric.
|
|
|
|
|
2013-06-13 22:24:40 +04:00
|
|
|
The provided escapement \a delta is applied as part of the bounding box
|
|
|
|
calculations. This lets you specify a character spacing is looser or
|
|
|
|
tighter than normal.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
2013-01-19 12:01:55 +04:00
|
|
|
The escapement_delta structure contains the following values:
|
2013-06-13 22:24:40 +04:00
|
|
|
- \c nonspace The amount of horizontal space to surround a visible glyph
|
|
|
|
character with.
|
|
|
|
- \c space The amount of horizontal space to surround a whitespace character
|
|
|
|
with, for example \c B_TAB or \c B_SPACE.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\param charArray The source character array.
|
|
|
|
\param numChars The number of characters to consider in \a charArray.
|
|
|
|
\param mode The \c font_metric_mode to use, screen or printing.
|
2013-01-19 12:01:55 +04:00
|
|
|
\param delta The escapement_delta structure to use.
|
2013-01-19 10:23:44 +04:00
|
|
|
\param boundingBoxArray The destination array of BRect bounding boxes.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*!
|
|
|
|
\fn void BFont::GetBoundingBoxesForStrings(const char *stringArray[],
|
|
|
|
int32 numStrings, font_metric_mode mode, escapement_delta deltas[],
|
|
|
|
BRect boundingBoxArray[]) const
|
2013-06-13 22:24:40 +04:00
|
|
|
\brief Writes an array of BRect objects to \a boundingBoxArray representing
|
|
|
|
the bounding rectangles of each string in \a stringArray with
|
|
|
|
consideration to the horizontal space provided by the escapement
|
|
|
|
\a deltas.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
Each BRect object corresponds to the bounding box of the entire string.
|
|
|
|
|
|
|
|
The \c font_metric_mode should contain one of the following values:
|
|
|
|
- \c B_SCREEN_METRIC The bounding boxes should use the screen metric.
|
|
|
|
- \c B_PRINTING_METRIC The bounding boxes should use the print metric.
|
|
|
|
|
2013-06-13 22:24:40 +04:00
|
|
|
The provided escapement \a deltas are applied as part of the bounding box
|
|
|
|
calculations. This lets you specify a character spacing is looser or tighter
|
|
|
|
than normal.
|
2013-01-19 11:45:18 +04:00
|
|
|
|
2013-06-13 22:24:40 +04:00
|
|
|
The escapement_delta structure contains the following values:
|
|
|
|
- \c nonspace The amount of horizontal space to surround a visible glyph
|
|
|
|
character with.
|
|
|
|
- \c space The amount of horizontal space to surround a whitespace character
|
|
|
|
with, for example \c B_TAB or \c B_SPACE.
|
2013-01-19 10:23:44 +04:00
|
|
|
|
|
|
|
\param stringArray The source string array.
|
|
|
|
\param numStrings The number of strings to consider in \a stringArray.
|
|
|
|
\param mode The \c font_metric_mode to use, screen or printing.
|
2013-01-19 12:01:55 +04:00
|
|
|
\param deltas The array of escapement_delta structures to use.
|
2013-01-19 10:23:44 +04:00
|
|
|
\param boundingBoxArray The destination array of BRect bounding boxes.
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
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/*!
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void BFont::GetGlyphShapes(const char charArray[], int32 numChars,
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BShape *glyphShapeArray[]) const
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\brief Writes an array of BShape objects to \a glyphShapeArray
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representing the glyph shapes of each character in
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\a charArray.
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Each BShape object corresponds to the glyph of one character.
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\param charArray The source character array.
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\param numChars The number of characters to consider in \a charArray.
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\param glyphShapeArray The destination array of BShape glyphs.
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*/
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/*!
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void BFont::GetHasGlyphs(const char charArray[], int32 numChars,
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bool hasArray[]) const
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\brief Fills out \a hasArray with whether or not each characters in
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\a charArray has a glyph for the font.
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\c true is written in \a hasArray if the character has a glyph in the
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current font and \c false is written in \a hasArray if the character
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does NOT have a glyph in the current font.
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\param charArray The source character array.
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\param numChars The number of characters to consider in \a charArray.
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\param hasArray The destination array of booleans.
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*/
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/*!
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BFont& BFont::operator=(const BFont &font)
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\brief Assignment overload method.
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\param font The BFont object to assign from.
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*/
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/*!
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bool BFont::operator==(const BFont &font) const
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\brief Equality comparison overload method.
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\param font The BFont object to compare the current font to.
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\returns \c true if the fonts objects are identical, \c false otherwise.
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*/
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/*!
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bool BFont::operator!=(const BFont &font) const
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\brief Inequality comparison overload method.
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\param font The BFont object to compare the current font to.
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\returns \c true if the fonts objects are NOT identical, \c true
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otherwise.
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*/
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/*!
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void BFont::PrintToStream() const
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\brief Writes information about the font to \c stdout.
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printf("BFont { %s (%d), %s (%d) 0x%x %f/%f %fpt (%f %f %f), %d }\n",
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family, fFamilyID, style, fStyleID, fFace, fShear, fRotation, fSize,
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fHeight.ascent, fHeight.descent, fHeight.leading, fEncoding);
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*/
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